Two-factor authentication in Intro to Computing - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to check if the user entered the correct password.

Intro to Computing

if user_input_password == [1]:
    print("Password accepted")

Drag options to blanks, or click blank then click option'

Astored_password

Binput_password

Cuser_password

Dpassword_input

Attempts:

3 left

💡 Hint

Common Mistakes

Using the input variable on both sides of the comparison.

The code compares the entered password with the stored password to verify it.

2fill in blank

medium

Complete the code to send a verification code to the user's phone.

Intro to Computing

send_sms(phone_number, [1])

Drag options to blanks, or click blank then click option'

Aphone_number

Buser_password

Cverification_code

Duser_id

Attempts:

3 left

💡 Hint

Common Mistakes

Sending the password instead of the verification code.

The verification code is sent to the user's phone number for the second authentication step.

3fill in blank

hard

Fix the error in the code that verifies the second factor code.

Intro to Computing

if entered_code == [1]:
    print("Access granted")
else:
    print("Access denied")

Drag options to blanks, or click blank then click option'

Auser_id

Buser_password

Cphone_number

Dverification_code

Attempts:

3 left

💡 Hint

Common Mistakes

Comparing the entered code with the password or phone number.

The entered code must be compared to the verification code sent to the user.

4fill in blank

hard

Fill both blanks to create a dictionary of users with their 2FA status.

Intro to Computing

users_2fa_status = {user: user.[1] for user in user_list if user.[1] [2] "enabled"}

Drag options to blanks, or click blank then click option'

Ais_2fa_enabled

Bnot

Cin

D==

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'in' or 'not' incorrectly in the condition.

The dictionary stores the 2FA status for each user who has 2FA enabled.

5fill in blank

hard

Fill all three blanks to filter users who passed both authentication steps.

Intro to Computing

authenticated_users = {user: status for user, status in users_status.items() if status['password'] [1] True and status['2fa'] [2] True and user [3] blocked_users}

Drag options to blanks, or click blank then click option'

A==

B!=

Cnot in

Din

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'in' instead of 'not in' for blocked users.

The code selects users who have both password and 2FA verified and are not in the blocked users list.